<template>
  <el-card class="box-card">
    <div slot="header" class="clearfix">
      <span>更换头像</span>
    </div>
    <div>
      <!-- 图片，用来展示用户选择的头像 -->
      <img v-if="avatar"  :src="avatar" alt="" class="preview" />
      <img v-else src="../../assets/images/avatar.jpg" alt="" class="preview" />

    <input type="file" accept="image/*" hidden ref="inputFile" @change="cImage">
      <!-- 按钮区域 -->
      <div class="btn-box">
        <el-button type="primary" icon="el-icon-plus" @click="oImage">选择图片</el-button>
        <el-button type="success" icon="el-icon-upload" :disabled ="avatar === ''" @click="updateAvatar">上传头像</el-button>
      </div>
    </div>
  </el-card>
</template>

<script>
import { updateAvatar } from '@/api/user'
export default {
  name: 'UserAvatar',
  data(){
    return {
        avatar:''
    }
  },
  methods:{
    oImage(){
        this.$refs.inputFile.click()
    },
    cImage(e){
        const file = e.target.files
        if(file.length === 0){
            this.avatar = ''
        } else {
            const fr = new FileReader()
            fr.readAsDataURL(file[0])
            fr.onload = e => {
                this.avatar = e.target.result
            }
        }
    },
    async updateAvatar(){
         const res = await updateAvatar({avatar:this.avatar})
         if(res.code !== 0 ) return  this.$message.error(res.message)
         this.$message.success(res.message)
         this.$store.dispatch('user/getUserList')
    }
  }
}
</script>

<style lang="less" scoped>
.btn-box {
  margin-top: 10px;
   width: 350px;
  height: 350px;
}
.preview {
  object-fit: cover;
  width: 350px;
  height: 350px;
}
</style>
